What Thunderbolt Does
Thunderbolt technology lets you connect your computer to other devices using a single cable. Through this cable, you can transfer files very quickly, display video on an external monitor, charge your device, and connect other peripherals like external hard drives. It works with many types of devices including computers, monitors, storage devices, and audio equipment.
How Fast Is It
Thunderbolt 3 and Thunderbolt 4 both transfer data at 40 gigabits per second, which is much faster than older USB connections. To put this in perspective, you could transfer an entire movie or large photo library in just seconds. Earlier versions of Thunderbolt were even faster in terms of technology, but the current versions meet most user needs.
History and Development
Thunderbolt was first introduced in 2011 as a collaboration between Intel and Apple. The first versions used different connectors, but Thunderbolt 3 switched to the USB-C connector, making it more compatible with other devices. This change made Thunderbolt more practical for everyday use since USB-C became a standard connector for many electronics.
Thunderbolt vs Other Connection Types
Thunderbolt is faster than standard USB connections and can do more things through one cable. USB 3.0 transfers data at 5 Gbps, while Thunderbolt 3 is eight times faster at 40 Gbps. Thunderbolt is also better for professional work like video editing because it can handle large amounts of data quickly, though it is more expensive than standard USB cables and devices.
Which Devices Use Thunderbolt
Many Apple computers including MacBook Pro and iMac use Thunderbolt ports. Some Windows computers from manufacturers like Dell and Lenovo also include Thunderbolt. Professional devices like external hard drives, video interfaces, and high-end monitors often use Thunderbolt for the fastest performance. 
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